ZONA
Asymmetric reinforced tubes for top of the range, custom,
competitive road and MTB frames.
Material:
- 25CrMo4 25CrMo4 seamless steel:
the chemical composition of this steel, specifying a higher percentage
of Chromium, gives to the material good resistance properties to
overheating. The formation of carbides prevents the grain enlargement:
the steel maintains its properties during brazing and welding, even in
the malleable raw state it features excellent mechanical
characteristics.
- Mechanical characteristics: UTS=800MPa, Ys=760MPa, Ap5 =12%
Suggested filler material for TIG welding: OK TIGROD 13.12 (AWS 5.28 ER
80S-G)
Suggested material for brazing: Castoline Silver Alloy 38230
Columbus 25CrMo4 is utilized for the production of the Zona, 29r and FAT
tubesets.
Characteristics of the Zona Tubes
- Non symmetrial tubes with cylindrical
butts.
- Moderate weight and notable strength
thanks to the newshapes, which are introduced for the first time also
for the tubes of the rear triangle.
- Elevated reliability and fatigue life.
Reasons to Choose Zona
- Athlete: Zona is the design
which finally allows for a reasonable compromise between weight,
strength and life of the frame. Thanks to the particular operations to
which Nivacrom is subjected and to the new sizes that also stiffen the
frame laterally by means of suitable grooves, it is possible to obtain
an end product with good characteristics of lightness and high
efficiency.
- Framebuilder: Zona allows for
the construction of reliable frames which are easy to realize, both in
the working of the tubes, the welding and the squaring operations of
the frame. Zona takes full advantage of the characteristics of
Nivacrom steel which has been especially developed for cycling.
The weight refers to sized and
mitered tube for a 54cm c-c road frame or a 18" (45.5cm) ATB
frame
Max shortage mm
Cutting area |
a |
Tube Stocked |
r |
Tube available to
special order only |
|